L02_GravTheoryMeasurement-page6

L02_GravTheoryMeasurement-page6 - Absolute and relative...

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Applied Geophysics – Gravity theory and measurement Table of rock densities Sedimentary overburden Igneous/metamorphic basement Similarity in rock densities can make it difficult to distinguish Applied Geophysics – Gravity theory and measurement
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Unformatted text preview: Absolute and relative Measuring g: g at the Earths surface ~ 980,000 mGal variations in g on the order 1 mGal need to measure g to better than 1 part in 1 million use instruments sensitive to relative changes in g...
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